Method of treating liquids with gases.



C. S. BRADLEY.

METHOD OF TREAHNG LIQUIDS WITH GASES.

APPLICAHGH HLEB use. as. 1913.

1 1 98 5 l 9, Patented Sept. 19, 1916.

IVl'lL-VESSES 1N VENT OR.

7 DRIVE VJ M W V w I W CHARLES SQBRADLEY, or NEW YORK, N. Y.

METHOD OF TREATING LIQUIDS WITH GASES.

To all whom it may concern Be it known that I, CHARLES S. BRADLEY, acitizen of the United States, residing in the borough of Manhattan,city, county, and State of New York, have invented certain new anduseful Improvements in Methods of Treating Liquids with Gases, of whichthe following is a full and clear specificalowing chemical actionoccurs:

In all such operations, it is desirable to effect as perfect apresentation of the liquid to the gas as possible, and the object of my.present invention is to provide a method and apparatus in whichthepresentation or commingling of the gas in the liquid is practicallycomplete, so that every particle of the liquid comes into contact withthe gas. According to my invention the operations are conducted in suchmanner that t e liquid is-formed into a froth or a mass of bubblescontaining the gas, so that substantially a film of liquid isproduced-at either side of which is a body of the gas. In order to in-"sure that all of the liquid will be thus injti'mately presented to thegas before it is discharged, I permit only the froth to be dischargedfrom the liquid in the tank or chamber. Where operations are to beperformed which require more extensive contact, I perform the operationsin a succession of steps, the froth from one chamber being allowed toresume liquid form and flow into the second chamber, where it is againconverted into a froth, and so onthrough repeated treatments until thedesired effect is obtained; In the case of treatments which involve theformation of pre cipitates, the precipitate may be collected after eachoperation or it may all be collected at the final step of the process.

The invention is illustrated by way of ex ample in the accompanyingdrawings, 111 which,

Specification of Letters Patent.

' may Patented Sept. 19, 1916.

Application filed December 18, 1913. Serial No. 807,537. a

Figure 1 is a diagrammatic elevation of a simple form of apparatus forcarrying out the method, and Fig. 2 is a vertical section of a morecomplex form of apparatus in which a succession of treatments may beperformed. v

Referring to Fig. 1, 10 .is the liquid contalner or frothing chamber, 11the gas supply pipe and 12 is a perforated gas discharge head fitted ongas supply pipe 11, by the packing 13. The container 10 may, forexample, be placed within an overflow receptacle 14. In'operation theliquid is introduced into container 10, and gas is forced into theliquid by way of pipe 11 and perforated discharge head 12. The bubblesin the liquid within container 10 produce afroth or foam.which bubblesover and is caught in the overflow receptacle 14, where ing that onlyfoam is discharged from container 10 it will be obvious that only thatportion of the liquid which has been intimately exposed to the gas willbe found in receptacle 14.

In Fig. 2 the apparatus is shown as com prising a series of frothingchambers 20, 21 and 22, formed in, for example, a cement bed 23, andhaving porous bricks 24, 25, 26 at the bottom, under which are the gaschambers 27, 28, 29 which are supplied with gas through main 30 andbranches 31, 82,

- 33. Inclined drain platforms 34 and 35 are arranged between successivefrothing chambers and a drain platform 36 leads to adischarge receptacle37. The liquid is'supplied from a tank 38 under the control of a cock39, which delivers the liquid into the first frothing chamber 20. Air orother gas is supplied by pump 40 to the main 30, from which it passesthrough the branches, gas

' it again returns to liquid form. By insurchambers, and porous bricksinto the liquid 1 within the frothing chambers. The gas passing upthrough the liquid forms a froth or foam which overflows and movesslowly down the drain platforms from onefrothin-gchamber to. another,being repeatedly restored to liquid condition 'on its way to eachsuccessive frothing chamber. The supply of liquid to chamber 20 is soadjusted as to prevent the liquid body from overflowing and to providethat only the foam will escape. At the completion of the firstoperation, the oxidizing or other desired action be still incomplete.further oxidized any suitable number of The liquid is times, after whichthe thoroughly oxidized liquid is discharged into receptacle 37.

The main terminates in a drain and 1. The method of producing chemicalaction between a gas and a liquid, which comprises introducing into theliquid a gas which is chemically active with respect thereto, to producea foam, and discharging only the foam therefrom as the product.

2. The method of oxidizing liquids which comprises introducing anoxidizing gas into an oxidizable liquid to produce a foam, separatingthe foam from the remaining liquid, and recovering the foam as theoxidized product.

3. The method of producing chemical action between a liquid and a gaswhich comprises introducing a liquid into a frothing chamber,introducing into said liquid a gas chemically active with respectthereto to produce a foam regulating the supply of liquid to saidfrothing chamber to cause only the foam to escape-therefrom, andrecovering the foam as a product.

4. The method of producing chemical action between a liquid and a gaswhich comprises introducing into the liquid a gaswhich is chemicallyactive with respect thereto to producea foam, discharging only the foamtherefrom, re-liquefying the foam, subjecting the re-liquefied foam to afurther frothing operation by means of the chemically active gas, andrecovering the froth from the re-liquefied foam only as a product.

CHARLES S. BRADLEY.

Witnesses:

WM. A. COURTLAND, OCTAVIUS KNIGHT.

